104 (1978) (law enforcement electric power encompasses preservation of historic landmarks land-use restrictions may possibly be enacted to increase the high-quality of life by preserving the character and aesthetic characteristics of metropolis) City of New Orleans v. Dukes, 427 U.S. 104 (1978) Agins v. City of Tiburon, 447 U.S. 59, 83-84 (1978). See also Usery v. Turner Elkhorn Mining Co., 428 U.S. How Much Porn is Accessible Online?